f150ben3

I'm trying to find out if Ford changed the length or width from 2004 to 2011 on the 6.5 ft bed? I know the tailgates are different but I have the opportunity to buy an Undercover Hardtop that was $800 new in 04 and the seller only wants $250 for it now, but hes an hour away. Hate to waste his time or mine if it wont fit.